Even if the product of a genetically modified organism was
dangerous in any way to our health, there's no way that danger
would reach to the end products that actually end up in Cheerios
— corn starch and sugar.

Original Cheerios has always been made with whole grain oats, and
there are no GMO oats. We do use a small amount of corn starch in
cooking, and just one gram of sugar per serving for taste. And
now that corn starch comes only from non-GM corn, and our sugar
is only non-GM pure cane sugar.

What doesn't fit is that these products would have no trace of
their genetically modified roots either way.

Genetically modified organisms have tiny alterations to their
DNA, the molecule that makes up their genome. This DNA change
results in changes to the plant's proteins. But neither the
plant's DNA or the proteins it produces make it into corn starch
or cane sugar, Cornell food scientist Margaret Smith said in a
statement sent to Business Insider:

Corn starch and sugar are highly refined products, so they
contain no DNA (which is what is introduced into a genetically
engineered organism) and no protein (which is what the new DNA
would produce in a genetically engineered organism). Because of
that, corn starch and sugar from a genetically engineered corn
variety are nutritionally and chemically identical to corn starch
or sugar from a non-genetically engineered variety.

This means that the new version of Cheerios that is being made
without use of genetically engineered varieties will be
nutritionally and chemically identical to the previous version.
So it will not offer anything new to consumers – other than to
give them the option to buy a product that does not support
planting more acres to genetically engineered crop varieties.

In fact, GM doesn't believe the GMOs are dangerous, and
freely admits that they are will likely be important in coming
years to meeting growing food demands.
Forsythe even notes in the post that "it's not
about safety" but they did it "because we think consumers may
embrace it."

Basically, the product is exactly the same, they know it isn't
dangerous, and the new labeling is pure advertising bull that's
feeding off of customers' unfounded fears and needlessly
reinforcing the unscientific idea that GMOs are dangerous.